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《Scientia Agricultura Sinica》 2012-23
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Genetic Effects of Holding Curing Potential in Flue-Cured Tobacco

HAO Xian-wei1,2,XU Xiu-hong1,3,XU Jia-lai3,CUI Sheng-li4,WANG Chuan-yi1,ZHANG Xing-wei1,REN Xia1,2,ZHU Pei1,2,ZHANG Zhong-feng1(1Tobacco Research Institute of Chinese Academy of Agricultural Sciences/Key Laboratory of Tobacco Biology and Processing,Ministry of Agriculture,Qingdao 266101,Shandong;2Graduate School of Chinese Academy of Agricultural Sciences,Beijing 100081;3Shandong Tobacco Academy,Ji’nan 250101;4Zibo Tobacco Company Limited,Zibo 255035,Shandong)  
【Objective】 The browning time is an important indicator to measure the holding potential of flue-cured tobacco.This property has long been exploited to elucidate the genetic effects of holding potential in flue-cured tobacco.【Method】The quantifying standard was formulated by observing and calculating the browning indexes(BI = ∑ B/n) via an experiment under dark condition.The holding curing potential of 6 generations(P1,P2,F1,F2,B1 and B2) derived from two crosses(Yunyan85× Dabaijin599 and Zhongyan100×Cuibi1) were genetically analyzed with the mixed major-gene plus polygene inheritance model.【Result】The holding curing potential of flue-cured tobacco was largely controlled by two major genes having additive-dominanceepistatic effect along with polygenes having additive-dominance-epistatic effects(Model E-0).The two major genes controlling the holding potential were found having negative additive effect.The heritability of all major genes was higher for the two crosses and the F2 generation showed the highest heritability.The heritability of polygenes was lower than major genes in all the segregating generations.【Conclusion】 Based on the genetic effects of holding potential of flue-cured tobacco varieties,it is essential to pay special attention to the parental material and the high generation in selecting the holding curing potential trait.
【Fund】: 国家公益性行业(农业)科研专项(201203091);; 中国烟草总公司科技重点项目(110201002017)
【CateGory Index】: S572
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